package com.xbj.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object obj) throws Exception {

        HttpSession session = request.getSession();

        Object userObj = session.getAttribute("loginUser");
        if (userObj != null) {
            return true;
        }

        response.sendRedirect("index.jsp");
        //request.getRequestDispatcher("login.jsp").forward(request,response);

        return false;
    }

    @Override
    public void afterCompletion(HttpServletRequest arg0,
                                HttpServletResponse arg1, Object arg2, Exception arg3)
            throws Exception {

    }

    @Override
    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
                           Object arg2, ModelAndView arg3) throws Exception {

    }

}
